That was part of a long standing problem in VFS, only fixed a few weeks ago.
Try a 3.4.4 or new kernel.
- - - -
I, and millions of other people, could run MS-DOS in the processor cache with room for user files. Who needs external (to the processor) storage?

3.4.4 rellied 2012-06-22. and I'm still running a 13.1 Kernel from the 90's
(UPDATE OS!)